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<div class="sect1">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="xmlsec-notes-compiling-unix"></a>Compiling and linking on Unix.</h2></div></div></div>
<p>There are several ways to get necessary compilation
	and linking information on Unix and application can use
	any of these methods to do crypto engine selection either
	at linking or run time.
	
	</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>PKG_CHECK_MODULES() macro
		</p>
<div class="example">
<a name="id-1.2.4.4.2.1.1.1.1"></a><p class="title"><b>Example 2. Using PKG_CHECK_MODULES() macro in a configure.in file
		    to select crypto engine (openssl) at linking time.</b></p>
<div class="example-contents"><pre class="programlisting">
dnl 
dnl Check for xmlsec and friends
dnl
PKG_CHECK_MODULES(XMLSEC, xmlsec1-openssl &gt;= 1.0.0 xml2 libxslt,,exit)
CFLAGS="$CFLAGS $XMLSEC_CFLAGS"
CPPFLAGS="$CPPFLAGS $XMLSEC_CFLAGS"
LDFLAGS="$LDFLAGS $XMLSEC_LIBS"
		    </pre></div>
</div>
<p><br class="example-break">

		</p>
<div class="example">
<a name="id-1.2.4.4.2.1.1.1.2"></a><p class="title"><b>Example 3. Using PKG_CHECK_MODULES() macro in a configure.in file
		    to enable dynamical loading of xmlsec-crypto library.</b></p>
<div class="example-contents"><pre class="programlisting">
dnl 
dnl Check for xmlsec and friends
dnl
PKG_CHECK_MODULES(XMLSEC, xmlsec1 &gt;= 1.0.0 xml2 libxslt,,exit)
CFLAGS="$CFLAGS $XMLSEC_CFLAGS"
CPPFLAGS="$CPPFLAGS $XMLSEC_CFLAGS"
LDFLAGS="$LDFLAGS $XMLSEC_LIBS"
		    </pre></div>
</div>
<p><br class="example-break">

	    </p>
</li>
<li class="listitem">
<p>pkg-config script
		</p>
<div class="example">
<a name="id-1.2.4.4.2.1.2.1.1"></a><p class="title"><b>Example 4. Using pkg-config script in a Makefile
		    to select crypto engine (nss) at linking time.</b></p>
<div class="example-contents"><pre class="programlisting">
PROGRAM = test
PROGRAM_FILES = test.c

CFLAGS	+= -g $(shell pkg-config --cflags xmlsec1-nss)
LDFLAGS	+= -g
LIBS 	+= $(shell pkg-config --libs xmlsec1-nss) 

all: $(PROGRAM)

%: %.c 
	$(cc) $(PROGRAM_FILES) $(CFLAGS) $(LDFLAGS) -o $(PROGRAM) $(LIBS)

clean:
	@rm -rf $(PROGRAM)
		    </pre></div>
</div>
<p><br class="example-break">


		</p>
<div class="example">
<a name="id-1.2.4.4.2.1.2.1.2"></a><p class="title"><b>Example 5. Using pkg-config script in a Makefile
		    to enable dynamical loading of xmlsec-crypto library.</b></p>
<div class="example-contents"><pre class="programlisting">
PROGRAM = test
PROGRAM_FILES = test.c

CFLAGS	+= -g $(shell pkg-config --cflags xmlsec1)
LDFLAGS	+= -g
LIBS 	+= $(shell pkg-config --libs xmlsec1) 

all: $(PROGRAM)

%: %.c 
	$(cc) $(PROGRAM_FILES) $(CFLAGS) $(LDFLAGS) -o $(PROGRAM) $(LIBS)

clean:
	@rm -rf $(PROGRAM)
		    </pre></div>
</div>
<p><br class="example-break">

	    </p>
</li>
<li class="listitem">
<p>xmlsec1-config script
		</p>
<div class="example">
<a name="id-1.2.4.4.2.1.3.1.1"></a><p class="title"><b>Example 6. Using xmlsec1-config script in a Makefile
		    to select crypto engine (e.g. gnutls) at linking time.</b></p>
<div class="example-contents"><pre class="programlisting">
PROGRAM = test
PROGRAM_FILES = test.c

CFLAGS	+= -g $(shell xmlsec1-config --crypto gnutls --cflags)
LDFLAGS	+= -g
LIBS 	+= $(shell xmlsec1-config --crypto gnutls --libs) 

all: $(PROGRAM)

%: %.c 
	$(cc) $(PROGRAM_FILES) $(CFLAGS) $(LDFLAGS) -o $(PROGRAM) $(LIBS)

clean:
	@rm -rf $(PROGRAM)
		    </pre></div>
</div>
<p><br class="example-break">

		</p>
<div class="example">
<a name="id-1.2.4.4.2.1.3.1.2"></a><p class="title"><b>Example 7. Using xmlsec1-config script in a Makefile
		    to enable dynamical loading of xmlsec-crypto library.</b></p>
<div class="example-contents"><pre class="programlisting">
PROGRAM = test
PROGRAM_FILES = test.c

CFLAGS	+= -g $(shell xmlsec1-config --cflags)
LDFLAGS	+= -g
LIBS 	+= $(shell xmlsec1-config --libs) 

all: $(PROGRAM)

%: %.c 
	$(cc) $(PROGRAM_FILES) $(CFLAGS) $(LDFLAGS) -o $(PROGRAM) $(LIBS)

clean:
	@rm -rf $(PROGRAM)
		    </pre></div>
</div>
<p><br class="example-break">
		</p>
</li>
</ul></div>
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